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ulmo-dev / ulmo

clean, simple and fast access to public hydrology and climatology data.
http://ulmo.readthedocs.org
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add option for ANSI codes when dealing with FIPS codes #54

Closed wilsaj closed 11 years ago

wilsaj commented 11 years ago

For geographic encoding, INCITS 31:2009 and 38:2009 have officially replaced FIPS 5-2 and 6-4 as the federal standards for encoding counties and states, but FIPS codes are still common amongst older datasets in order to be able to join across datasets (for example GSOD provides FIPS codes, but to join on current US Census data we'd need to be able to connect that to the corresponding ANSI codes).

List of ANSI codes: http://www.census.gov/geo/www/ansi/national.txt

More info on replacement of FIPS codes: http://www.nist.gov/itl/upload/FIPSCodesReplacementChart2012.pdf

wilsaj commented 11 years ago

I had this wrong.

Looks like the "ownership" of FIPS codes and semantics just transferred from NIST -> ANSI, but the codes stayed the same so ANSI codes aren't really distinct from FIPS codes.

See: http://www.census.gov/geo/reference/ansi.html